The Experts below are selected from a list of 4089 Experts worldwide ranked by ideXlab platform
Hirofumi Akagi - One of the best experts on this subject based on the ideXlab platform.
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voltage regulation performance of a Shunt Active Filter intended for installation on a power distribution system
IEEE Transactions on Power Electronics, 2007Co-Authors: Hideaki Fujita, Hirofumi AkagiAbstract:This paper discusses a Shunt Active Filter intended for installation on a power distribution system. The Active Filter has an additional capability to regulate the distribution-line voltage by means of adjusting reActive power. Theoretical analysis investigates the dynamic performance of combined harmonic damping and voltage regulation. As a result, harmonic damping makes it possible to improve the stability of the control loop for voltage regulation, and the combined harmonic damping and voltage regulation lead to good voltage regulation performance. Experimental results are shown to verify the effectiveness of the combined harmonic damping and voltage regulation
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Comparisons between a hybrid Shunt Active Filter and a pure Shunt Active Filter
Electrical Engineering in Japan, 2005Co-Authors: Yasuhiro Tamai, Sunt Srianthumrong, Hirofumi AkagiAbstract:This paper deals with the hybrid Shunt Active Filter for harmonic compensation of a three-phase diode rectifier in a 480-V adjustable-speed motor drive system. The hybrid Filter is formed by a three-phase LC Filter tuned around the seventh harmonic frequency and a small-rated three-phase voltage-source PWM inverter. The LC Filter and PWM inverter are directly connected in series. As a result, the DC capacitor voltage of the PWM inverter in the hybrid Filter is much lower than that of a conventional pure Shunt Active Filter. This results in higher efficiency, less switching ripple, and less EMI emission. Computer simulation is carried out to compare the hybrid Filter with the pure Filter in terms of circuit configuration and Filtering performance. Simulation results indicate that the hybrid Filter is superior in effectiveness and viability to the pure Filter. In addition, theoretical analysis based on vector loci confirms the validity of the simulation results. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 153(2): 61–70, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20145
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voltage regulation performance of a Shunt Active Filter intended for installation on a power distribution system
Power Electronics Specialists Conference, 2005Co-Authors: Hideaki Fujita, Hirofumi AkagiAbstract:This paper discusses a Shunt Active Filter intended for installation on a power distribution system, with focus on voltage regulation capability. The Active Filter has capability of regulate the distribution-line voltage by means of adjusting its reActive power. Theoretical analysis investigates the dynamic performance of harmonic damping and voltage regulation as well as computer simulation does. As a result, it is clarified that a harmonic detection error may increase the voltage fluctuations in transient states. A new compensation method is proposed to reduce the voltage fluctuations in transient states. Experimental results show that the proposed method makes it possible to reduce the voltage fluctuation in transient states
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Comparisons Between a Hybrid Shunt Active Filter and a Pure Shunt Active Filter
IEEJ Transactions on Industry Applications, 2004Co-Authors: Yasuhiro Tamai, Sunt Srianthumrong, Hirofumi AkagiAbstract:This paper deals with a hybrid Shunt Active Filter for harmonic compensation of a three-phase diode rectifier in a 480-V adjustable-speed motor drive system. The hybrid Filter is formed by a three-phase LC Filter tuned around the 7-th harmonic frequency and a small-rated three-phase voltage-source PWM inverter. The LC Filter and PWM inverter are directly connected in series. As a result, the dc capacitor voltage of the PWM inverter in the hybrid Filter is much lower than that of a conventional pure Shunt Active Filter. This results in higher efficiency, less switching ripple and less EMI emission. Computer simulation is carried out to compare the hybrid Filter with the pure Filter in terms of circuit configuration and Filtering performance. Simulation results indicate that the hybrid Filter is superior in effectiveness and viability to the pure Filter. In addition, theoretical analysis based on vector loci confirms the validity of the simulation results.
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control and performance of a fully digital controlled Shunt Active Filter for installation on a power distribution system
IEEE Transactions on Power Electronics, 2002Co-Authors: Pichai Jintakosonwit, Hideaki Fujita, Hirofumi AkagiAbstract:This paper presents a fully-digital-controlled Shunt Active Filter for harmonic termination of a power distribution system. The main purpose of the Active Filter based on voltage detection is not to compensate for current harmonics but to damp out harmonic propagation caused by line inductors and Shunt capacitors for power factor correction. However, time and phase delays inherent in digital controllers might lead to unsatisfactory harmonic-damping performance although digital controllers are preferable to analog controllers. This paper deals with the design and implementation of a digital controller for a Shunt Active Filter based on voltage detection. Experimental results obtained from a laboratory system developed in this paper verify the viability and effectiveness of the fully-digital-controlled Active Filter.
Hideaki Fujita - One of the best experts on this subject based on the ideXlab platform.
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voltage regulation performance of a Shunt Active Filter intended for installation on a power distribution system
IEEE Transactions on Power Electronics, 2007Co-Authors: Hideaki Fujita, Hirofumi AkagiAbstract:This paper discusses a Shunt Active Filter intended for installation on a power distribution system. The Active Filter has an additional capability to regulate the distribution-line voltage by means of adjusting reActive power. Theoretical analysis investigates the dynamic performance of combined harmonic damping and voltage regulation. As a result, harmonic damping makes it possible to improve the stability of the control loop for voltage regulation, and the combined harmonic damping and voltage regulation lead to good voltage regulation performance. Experimental results are shown to verify the effectiveness of the combined harmonic damping and voltage regulation
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voltage regulation performance of a Shunt Active Filter intended for installation on a power distribution system
Power Electronics Specialists Conference, 2005Co-Authors: Hideaki Fujita, Hirofumi AkagiAbstract:This paper discusses a Shunt Active Filter intended for installation on a power distribution system, with focus on voltage regulation capability. The Active Filter has capability of regulate the distribution-line voltage by means of adjusting its reActive power. Theoretical analysis investigates the dynamic performance of harmonic damping and voltage regulation as well as computer simulation does. As a result, it is clarified that a harmonic detection error may increase the voltage fluctuations in transient states. A new compensation method is proposed to reduce the voltage fluctuations in transient states. Experimental results show that the proposed method makes it possible to reduce the voltage fluctuation in transient states
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control and performance of a fully digital controlled Shunt Active Filter for installation on a power distribution system
IEEE Transactions on Power Electronics, 2002Co-Authors: Pichai Jintakosonwit, Hideaki Fujita, Hirofumi AkagiAbstract:This paper presents a fully-digital-controlled Shunt Active Filter for harmonic termination of a power distribution system. The main purpose of the Active Filter based on voltage detection is not to compensate for current harmonics but to damp out harmonic propagation caused by line inductors and Shunt capacitors for power factor correction. However, time and phase delays inherent in digital controllers might lead to unsatisfactory harmonic-damping performance although digital controllers are preferable to analog controllers. This paper deals with the design and implementation of a digital controller for a Shunt Active Filter based on voltage detection. Experimental results obtained from a laboratory system developed in this paper verify the viability and effectiveness of the fully-digital-controlled Active Filter.
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Performance of Automatic Gain Adjustment in a Shunt Active Filter Intended for Installation on Power Distribution Systems
IEEJ Transactions on Industry Applications, 2002Co-Authors: Jintakosonwit Pichai, Hideaki Fujita, Hirofumi Akagi, Satoshi OgasawaraAbstract:This paper discusses automatic gain adjustment in a fully-digital-controlled Shunt Active Filter intended for installation on power distribution systems. This is the first step in cooperative control of multiple Shunt Active Filters based on voltage detection for harmonic damping throughout power distribution systems. In general, an optimal control gain is equal to the characteristic impedance of a distribution line. However, it is difficult to know circuit parameters of a real distribution line, which depend strongly on feeder connections, Shunt capacitors and loads. Therefore, the main purpose of the gain adjustment is to help the Active Filter to damp out harmonic propagation without considering the circuit parameters. Moreover, the gain adjustment can reduce the compensating current and losses in the Active Filter. The Active Filter having the function of automatic gain adjustment is experimentally compared to that with a constant gain. Experiment results verify the effectiveness of the Active Filter having the function of automatic gain adjustment.
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a Shunt Active Filter based on voltage detection for harmonic termination of a radial power distribution line
IEEE Industry Applications Society Annual Meeting, 1998Co-Authors: Hirofumi Akagi, Hideaki Fujita, Keiji WadaAbstract:This paper focuses on a Shunt Active Filter based on the detection of harmonic voltages at the point of installation. The objective of the Active Filter is to attenuate harmonic propagation resulting from series/parallel resonance between capacitors for power factor correction and line inductors in a power distribution line. The Active Filter acts as a low resistor to the external circuit for harmonic frequencies, and it is installed on the end bus of the power distribution line, just like a 50 /spl Omega/ terminator installed on the end terminal of a signal transmission line. Therefore, the function of the Active Filter is referred to as "harmonic termination" in this paper. Experimental results obtained from a laboratory system rated at 200 V and 20 kW verify that the Active Filter for the purpose of harmonic termination has the capability of harmonic damping throughout the power distribution line.
Yung-fu Huang - One of the best experts on this subject based on the ideXlab platform.
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Design of single-phase Shunt Active Filter for three-phase four-wire distribution systems
2010 IEEE Energy Conversion Congress and Exposition ECCE 2010 - Proceedings, 2010Co-Authors: Chung-chuan Hou, Yung-fu HuangAbstract:This study presents single-phase Shunt Active Filter for three-phase four-wire distribution systems to alleviate the overloading of the neutral conductor. The single-phase Shunt Active Filters are installed near the nonlinear diode rectifier loads for each phase. The single-phase Shunt Active Filter system compensates for current harmonics of the diode rectifier load. Furthermore, an integrated pulse width modulator with dead-time generator is adopted to improve output voltage accuracy of single-phase Shunt Active Filter. Simulation and test results are utilized to verify the performance of the single-phase Shunt Active Filter for three-phase four-wire distribution systems.
A. Golea - One of the best experts on this subject based on the ideXlab platform.
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Three-phase four-wire Shunt Active Filter under unbalanced loads with backstepping and PI controllers
Australian Journal of Electrical and Electronics Engineering, 2017Co-Authors: T. Mahni, M.t. Benchouia, A. Ghamri, A. GoleaAbstract:AbstractThis paper proposes backstepping technique for the direct-current bus voltage control in three-phase four-wire Shunt Active Filter. The identification of reference currents is made by synchronous referential frame theory with self-tuning Filter. The three-phase four-wire Shunt Active Filter is implemented with DSPACE 1104 system to compensate harmonics generated by unbalanced system of non-linear loads. Four-leg topology is used for the inverter of Shunt Active Filter and the switching patterns of the inverter are generated by analogue hysteresis card. The experimental results verify the good performance of the proposed Shunt Active Filter in term of harmonic currents reduction and improvement of power quality. A comparison between backstepping controller and the conventional proportional-integral controller is illustrated, in steady state, the two controllers fixe direct-current bus voltage at its reference value, however, a clear advantage of the backstepping control in dynamic state can be obse...
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Three-phase For-wire Shunt Active Filter with Unbalanced Loads
Energy Procedia, 2014Co-Authors: T. Mahni, M.t. Benchouia, A. Ghamri, Kamel Srairi, A. GoleaAbstract:Abstract The electrical power quality at low voltage alternative networks became a serious concern because of the increased use of non- linear loads and pollutants. This work is to improve the quality of electric current in such networks. Four-Wire Shunt Active Filter is studied; deferent loads (balanced and unbalanced) are discussed. We propose to identify harmonic and reActive currents at the base of Self-Tuning-Filters, which proved very good Filtering performance, either in transient or steady state. The simulations demonstrate the importance of this work in harmonic Filtering and reActive power compensation.
Chung-chuan Hou - One of the best experts on this subject based on the ideXlab platform.
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Design of single-phase Shunt Active Filter for three-phase four-wire distribution systems
2010 IEEE Energy Conversion Congress and Exposition ECCE 2010 - Proceedings, 2010Co-Authors: Chung-chuan Hou, Yung-fu HuangAbstract:This study presents single-phase Shunt Active Filter for three-phase four-wire distribution systems to alleviate the overloading of the neutral conductor. The single-phase Shunt Active Filters are installed near the nonlinear diode rectifier loads for each phase. The single-phase Shunt Active Filter system compensates for current harmonics of the diode rectifier load. Furthermore, an integrated pulse width modulator with dead-time generator is adopted to improve output voltage accuracy of single-phase Shunt Active Filter. Simulation and test results are utilized to verify the performance of the single-phase Shunt Active Filter for three-phase four-wire distribution systems.
